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Expired Canadian patentCanada

Dielectric-heating electrode device for hyperthermia

CA 1305531 C · Owner: Kureha Kagaku Kabushiki Kaisha · Inventors: Onodera, Chikau; Kitagawa, Kiyoshi; Onuma, Tadashi

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An electrode device for heating a body surface by an electric field with a high-frequency which is deformable along with a shape of the body surface comprising, a thick walled container made of a flexible polymeric material and having means for supplying and discharging a coolant, an electrode member of an easily deformable shape which is disposed to an inner surface of the thick walled container on the side opposite to an open surface and a, flexible polymeric film for tightly closing the open surface of the thick walled container.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 23, 1987
GrantedJuly 21, 1992
Term endedJuly 21, 2009
Patent numberCA 1305531 C
Classification (IPC)A61N1/06 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJune 23, 1987Patent grantedJuly 21, 1992Term endedJuly 21, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.